26   rtc::StringBuilder ss;  in ToString()  local
27   ss << "frame_number " << frame_number;  in ToString()
28   ss << " decoded_width " << decoded_width;  in ToString()
29   ss << " decoded_height " << decoded_height;  in ToString()
30   ss << " spatial_idx " << spatial_idx;  in ToString()
31   ss << " temporal_idx " << temporal_idx;  in ToString()
32   ss << " inter_layer_predicted " << inter_layer_predicted;  in ToString()
33   ss << " non_ref_for_inter_layer_pred " << non_ref_for_inter_layer_pred;  in ToString()
34   ss << " frame_type " << static_cast<int>(frame_type);  in ToString()
35   ss << " length_bytes " << length_bytes;  in ToString()
36   ss << " qp " << qp;  in ToString()
37   ss << " psnr " << psnr;  in ToString()
38   ss << " psnr_y " << psnr_y;  in ToString()
39   ss << " psnr_u " << psnr_u;  in ToString()
40   ss << " psnr_v " << psnr_v;  in ToString()
41   ss << " ssim " << ssim;  in ToString()
42   ss << " encode_time_us " << encode_time_us;  in ToString()
43   ss << " decode_time_us " << decode_time_us;  in ToString()
44   ss << " rtp_timestamp " << rtp_timestamp;  in ToString()
45   ss << " target_bitrate_kbps " << target_bitrate_kbps;  in ToString()
46   ss << " target_framerate_fps " << target_framerate_fps;  in ToString()
47   return ss.Release();  in ToString()
52   rtc::StringBuilder ss;  in ToString()  local
53   ss << prefix << "target_bitrate_kbps: " << target_bitrate_kbps;  in ToString()
54   ss << "\n" << prefix << "input_framerate_fps: " << input_framerate_fps;  in ToString()
55   ss << "\n" << prefix << "spatial_idx: " << spatial_idx;  in ToString()
56   ss << "\n" << prefix << "temporal_idx: " << temporal_idx;  in ToString()
57   ss << "\n" << prefix << "width: " << width;  in ToString()
58   ss << "\n" << prefix << "height: " << height;  in ToString()
59   ss << "\n" << prefix << "length_bytes: " << length_bytes;  in ToString()
60   ss << "\n" << prefix << "bitrate_kbps: " << bitrate_kbps;  in ToString()
61   ss << "\n" << prefix << "framerate_fps: " << framerate_fps;  in ToString()
62   ss << "\n" << prefix << "enc_speed_fps: " << enc_speed_fps;  in ToString()
63   ss << "\n" << prefix << "dec_speed_fps: " << dec_speed_fps;  in ToString()
64   ss << "\n" << prefix << "avg_delay_sec: " << avg_delay_sec;  in ToString()
65   ss << "\n"  in ToString()
67   ss << "\n"  in ToString()
69   ss << "\n"  in ToString()
72   ss << "\n"  in ToString()
74   ss << "\n"  in ToString()
76   ss << "\n" << prefix << "avg_qp: " << avg_qp;  in ToString()
77   ss << "\n" << prefix << "avg_psnr: " << avg_psnr;  in ToString()
78   ss << "\n" << prefix << "min_psnr: " << min_psnr;  in ToString()
79   ss << "\n" << prefix << "avg_ssim: " << avg_ssim;  in ToString()
80   ss << "\n" << prefix << "min_ssim: " << min_ssim;  in ToString()
81   ss << "\n" << prefix << "num_input_frames: " << num_input_frames;  in ToString()
82   ss << "\n" << prefix << "num_encoded_frames: " << num_encoded_frames;  in ToString()
83   ss << "\n" << prefix << "num_decoded_frames: " << num_decoded_frames;  in ToString()
84   ss << "\n"  in ToString()
87   ss << "\n" << prefix << "num_key_frames: " << num_key_frames;  in ToString()
88   ss << "\n" << prefix << "num_spatial_resizes: " << num_spatial_resizes;  in ToString()
89   ss << "\n" << prefix << "max_nalu_size_bytes: " << max_nalu_size_bytes;  in ToString()
90   return ss.Release();  in ToString()